"In 1635 orders were given to improve
the coinage, and to add the legend Yi Li, one Li, i.e. a thousand part of
a tael or an ounce, indicating the value in silver. On the right side is
the name of the mint" [S]

"This coin was cast in the year of
the Emperor's reign (1644). It was issued from the mint attached to the
Board of Revenue at Peking, and bears on the reverse the inscription in
Manchu letters Boo Ciowan, being the transcript of the two Chinese characters
Pao Ch'uan, 'the Fountain Head of the Currency." The money from this
mint served as a model for the provincial coinages"
[S]